So I decided to cut the rear two cat off my truck and now it smokes. I have a super 44 flowmaster and duals out, if that helps. it didnt smoke before i cut them off and run great other then the smoke.

 

what color smoke?

 

Blue smoke means oil. White/grey smoke is fuel related. But you prob have fuel smoke because cats burn off excess fuel. Since you took those out, there's nothing left to burn the excess gas off making it come out as smoke

 

Blue smoke for sure

 

That's oil, cutting the cat out shouldnt affect that unles it was burning the oil that was passing thru too, does ur truck oil level go down at all?

 

Remember the cats catch everything from the motor it was smoking the whole time for sure the cats were doing there job to eliminate it

 

oil level is good and it stop smoking altogether

 

That's good

 

Yes sir it is. Now for my 2nd question. is it possible that the front cat add oil left in it and just burning it off. i don't like the idea that it was burning it.